In 2006 the UK Minster of Defence announced the deployment of British Troops to Helmand Province, Afghanistan, saying: "We would be happy to leave Afghanistan without firing a single shot". "The Patrol" features a British Army Operational Mentor and Liaison Team supporting this NATO led operation. As the scale of the Taliban insurgency dawns on the soldiers, problems with their operation cause the men to question their role in the war.于是,陈源开始不时怔怔地发呆,时常陷入回忆之中,想起遗憾的事会皱眉会叹气,想起开心的事也会露出一丝淡淡的笑容。